Combination boring and facing machine



w. 1. HEMPY. COMBINATION BORING AND FACING MACHINE.

APPLICATION FILED DEC-27. 19x9.

Patented Aug. 22, 1922.

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WITNESS W A TTORNE Y.

W. J. HEMPY.

COMBINATION BORING AND FACING MACHINE.

APPLICATION FILED DEC.27| I919.

Patented Aug. 22, 1922.

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WILBUR J. HEMPY, OF KANSAS CITY, MISSOURI, ASSIGNOR T0 HEMPY-COOPERMAIQ'U- FACTURING COMPANY, A COIBIZEORATION OF MISSOURI.

COMBINATION BORING AND FACING MACHINE.

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T 0 all whom it may concern:

Be it known that I, l/VILBUR J. HEMPY, a citizen of the United States,residing at Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful Improvements in Combination Boringand Facing Machines, of which the following is a specification.

My invention relates to hearing boring and trimming machines and is animprovement over my copending application for bearing boring machinesfiled February 2 1,

1919, Serial Number 278,686. The important features of the presentinvention are, first, novel means for automatically throwing the boringmandrel out of gear with the feed nut after the latter has advanced theformer to the end of the thread of said feed nut; and second, means forfacing the ends of the babbitt linings of the cylinder block bearings.

In order that the invention may be fully understood, reference will nowbe had to the accompanying drawings, in which:

Fig. 1 is a plan view of the machine in position upon an invertedcylinder block.

Fig. 2 is a fragmentary elevation of a portion of the boring mandrel.

Fig. 3 is an elevation of a cam secured in one end of the feed nut.

Fig. 4 is an end elevation of said cam.

Fig. 5 is an end elevation of the machine in position upon the cylinderblock, the drive shaft of the boring machine beingin cross section. I

Fig. 6 is an enlarged section on line VI-VI of Fig. 1.

Fig. 7 is a cross section on line VII-VII of Fig. 8.

Fig. 8 is a fragmentary view partly in section of the boring mandrel,the feed nut, and the cam.

Fig. 9 is-an enlarged broken plan view partly in section of the machinein position upon the cylinder block and equipped with means for facingthe linings of the bearings.

Fig. 10 is a disassembled view of the means for adjusting the mandrellongitudinally during the operation of facing the ends of the bearinglinings.

Fig. 11 is an end elevation of one of the facing tools.

A, designates the engine cylinder block which is usually provided withthree alined Specification of Letters Patent.

Application filed December 27, 1919. Serial No. 347,791.

bearings B, lined with Babbitt metal E, in which the crankshaft (notshown) is journaled. Said bearings B are formed integral with transversesupports 6, extending from side to side of the cylinder block A, whichlatter is also provided at its ends with the usual cam shaft bearings G,which coact in locatlng my machine in proper position upon the cylinderblock A, as Will hereinafterappear.

Referring now in detail to the various parts of my machine, 1 designatesa skeleton frame which is shaped to fitdirectly upon the flange Dsurrounding the base of the inverted cylinder block A. Said frame 1 isprovided with bolt holes which register with the usual holes in theflanges D to receive bolts 3, whereby the frame 1 is firmly secured uponsaid flange D.

The frame 1 is provided with transverse bearings 5, 7, 9 and 11, inwhich a boring mandrel 13 is journaled. Said mandrel 13 is equipped withthree cutting tools 15, one for each babbitted bearing 13. The mandrel13 is advanced longitudinally to carry the cutting tools 15 from end toend of the bearings B, through the intermediacy of a feed nut 25 and aprojecting element 27 which latter is rigidly fixed to the mandrel 13.

The feed nut 25 is secured by suitable means such as a set screw 24cupona cam 26 journaled upon the mandrel 13, and the rear end of the internalthread 30 of said feed nut 25 tapers to a point 31 and terminates nearthe adjacent end of the cam 26, leaving an intervening space 29 slightlywiderthan the thickness of the element 27. Thus when said element 27reaches the tapered point 31 of the internal thread 30, it revolves inthe space 29 and ceases to advance the mandrel 13, and hence danger ofdamaging themachine should theoperator inadvertently fail to stop itafter the cutting tools 15 have traversed thev length of the bearings 13is eliminated. I a The inner end of the cam 26 has a shoulder 32 whichis approximately diametricallyopposed to the tapered end 31 of thethread 30 to leave a space longer than the element 27, so that after thesame has been carried by said point 31 into the space 29 and thedirection of travel of the nut 25 is reversed, the shoulder 32 oncontacting with said elewant 27 Will shift the same bodily to the shaft38, in bearings 40 right against the thread 30, as indicated by dottedlineson Fig. 6. Then as the feed nut 25 continues to rotate the point 31will engage the left side of the element 27 and start the samebackwardly to the right through the thread 30. One end of the element 27is beveled as indicated at 33, so that in case the shoulder 32 of thecam 26 should fail to fully shift said thread 27 against the element 30as shown on Fig. 6, the tapered terminal 31 will engage said beveled end33 and force the element 27 against the thread 30.

The feed nut 25 is provided atone end with an integral pinion 34, whichis driven by a master gear 36 mounted upon a drive mounted on the frame1.

The mandral 13 is provided with a gear 42, journaled in the bearing 9and having a groove-and-feather connection 44 with said mandrel 13 forthe purpose of rotating the ,Same'a'ndalso to permitsaid mandrel toslide longitudinally in the gear 42, which is driven by a master gear46, slidably mounted upon the drive shaft 38 beside the master gear 36,so that-it may be shifted outof mesh with the gear 42.

The gears 34, 42, 36 and 46 are proportioned'to drive the feed nut 25slightly faster than the mandrel 13, so that the latter will beadvancedby the former from end to end may be power driven wherepower isavailable.-

52 designates a pai-r of centering-pins slidably mounted in bearings 54at the free ends of two arms 56, which latter are provided at theiropposite ends with bearings '58. One

"end of each centering-pin 52 is provided with :a handle 60, while itsopposite end is adapted to fit snugly within the adjacent cam shaftbearing C, to .coact withthe bolts3 in properly centering the'boringmandrel 13in proper relation "to the bearings B.

The bearings '58 at the right straddle the bearing 11 and are swiveledupon the boring mandrel 13, while the bearings 58 at thje'left.straddlethe' bearing5 and are swiveled upon abushing 64 in which'theadjacent end of the boring mandrel 13 is'journaled. The bushing'64 issecured in the bearing '5 by suitable meanssuchas a set screw 66 and isprovided at one "end with relatively fine screw threads 68 upon which acoupling member '70 is threaded. The coupling-mempling member 74,with-which it coacts in loosely grasping the peripheral flange 76 of asleeve 78. A set screw 77 is employed to lock the coupling members 7 0and 74 together. The sleeve 78 has longitudinal slots 80 extendingthrough one end to render it resilient, so that it may be caused tofirmly grip the boring mandrel 13 by means of a set screw 82, threadedinto a collar 84 remo'vably mounted upon said sleeve 7 8.

In practice, the frame 1 is placed upon the inverted cylinder block A insuch position as to'bring the mandrel 13' into axial alinement withthe'bearings B, which operation is aided by the centering-pins 52 andthe cam shaft bearings C. The frame 1 is then firmly secured in place bythe bolts The cutting tools 15 are'then adjusted to trim out the babbittlinings E to the desired depth, after which the drive shaft 38 isrotated to drive the mandrel 13 and the feed nut 25 through theintermediacy of the gears 46, 42, and 36 and 34, respectively, untilsaid cutting tools 15 travel from the right end tothe left end of thebearings B, and the element27 is car ried into the space 29 by the end31 of the thread 30. If desired, theboring mandrel 13 and the cuttingtools 15 may then be quickly carried backwardly to the starting point atthe right end of the bearings 13 by shifting the gear 46 out of meshwith the pinion 42 and reversing the motion of the feed nut 25 byrotating the shaft 38 backwardly. However, if it is desired. to face theends of the babbitt linings E, the cutting tools 15 are removed from theboring men drel 13 and facing tools 88 are substituted.

Facing of the ends F is accomplished by "shifting the boring'mandrel 13to the right until the facing tools 88 engage and trim the leftcnds F ofthe babbitt linings )E to the desired point. Shifting of the mandrel 13to the right is accomplished slowly but positively by rotating thecoupling members and 74 in proper direction to screw them to the rightupon the threaded portion of the bushing 64. As the coupling members 70and 74 move to the right they carry the sleeve 78 and the mandrel 13therewith, which latter is rotated as it moves to the right, by a crank90,'which is slipped upon therectangularterminal 92 at the left end ofsaid boringmandrel 13. After the left ends of the linings E have beenfaced the tools 88 areremoved and the set screw 84 is loosened to allowthe sleeve 78 to release the boring mandrel 13, which is thenslid to theright to the position shown on Fig. 9, and again secured by tighteningthe sleeve 78. The facing tools 88 are then replaced in the mandrel 13and caused to trim the right ends of the linings'B, by rotating thecrank 90 and screwing the coupling members 70 and 74 to the left uponthe bushing 64.

From the foregoing description it is ap parent that I have producedsimple and eificient means for boring and facing the linings of cylinderblock bearings, and while I have shown and described the preferred formof my invention, I reserve the right to make such changes in theconstruction, combination and arrangement of parts as properly fallwithin the spirit and scope of the invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is:

1. In a machine of the character described, a mandrel, means foroperably holding said mandrel in the alined be rings of a cylinderblock, tools carried by said mandrel to operate on the linings of saidbearings, means for driving said mandrel, a rotary feed nut looselyembracing the mandrel and having an internal thread tapered at one endand a space at said tapered end, an element XGCl to the mandrel andadapted to be advanced by the internal thread until it enters the spaceat the tapered end of said thread, and a projection in said space toshift said element back into engagement with the internal thread uponreversal of the feed nut.

2. In a machine of the character described, a mandrel, means foroperably holding said mandrel in the alined bearings of a cylinderblock, tools carried by said mandrel to operate on the linings of saidbearings, means for driving said mandrel, a feed, nut loosely embracingsaid mandrel and. having an internal thread and a space at one end ofsaid thread, an element fixed to the mandrel and adapted to be advancedby the internal thread until it enters the space at the end of saidthread, a cam secured to the feed nut and having a shoulder projectinginto the space to shift the element back into engagement with theinternal thread upon reversal of the feed nut, means for rotating themandrel, and means for driving the feed nut in opposite directions at adifferent speed from that of the mandrel to advance and retract the samethrough the intermediacy of the element and the internal thread.

3. In a machine of the character described, a rotary mandrel, a frame inwhich said mandrel is mounted and whereby it is operably held in thealined bearings of a cylinder block, a tool carried by said mandrel toface the ends of the lining in one or more of the bearings, a tn'eadedbushing loosely embracing the mandrel and secured in the frame, a splitsleeve adjacent said bushing and secured to the mandrel, and meansthreaded on the bushing and engaging said sleeve for adjusting the samelongitudinally to carry the tool in and out of engagement with the endof the lining.

4. in a machine of the character described, a boring mandrel, a crankfor rotating said boring mandrel, a frame in which the mandrel ismounted and whereby it is operably held in the alined bearings of acylinder block, a tool carried by said mandrel to face the bearings ofthe lining in one or more of the bearings, a threaded bushing looselyembracing the mandrel and secured to the frame, a split sleeve adjacentsaid bushing and secured to the mandrel, a marginal flange on one end ofsaid sleeve, and a coupling threaded upon the bushing and engaging theflange of the sleeve to adjust the same longitudinally to carry the toolin and out of engagement with the ends of the lining.

5, In a machine of the character described, a rotary mandrel, a toolcarried thereby, a rotary feed nut loosely embracing said mandrel andhaving an internal thread and a space at one end of said thread, anelement fixed to the mandrel and adapted to be advanced by the internalthread until it enters the space at one end of said thread, and means insaid space to shift said element back into engagement with the internalthread upon reversal of the feed nut.

in testimony whereof, I aiiix my signature, in the presence of twowitnesses.

WILBUR J. HEMPY.

Witnesses:

F. G. FIsoHnn, L. J; Frscnnn.

